text: /* Copyright (c) 2008-2009, The Linux Foundation. All rights reserved.
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 and
   * only version 2 as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   */
  
  #include <linux/module.h>
  #include <linux/moduleparam.h>
  #include <linux/kernel.h>
  #include <linux/slab.h>
  #include <linux/fb.h>
  #include <linux/string.h>
  #include <linux/version.h>
  #include <linux/backlight.h>
  
  #include "msm_fb.h"
  
  static int msm_fb_bl_get_brightness(struct backlight_device *pbd)
  {
  	return pbd->props.brightness;
  }
  
  static int msm_fb_bl_update_status(struct backlight_device *pbd)
  {
  	struct msm_fb_data_type *mfd = bl_get_data(pbd);
  	__u32 bl_lvl;
  
  	bl_lvl = pbd->props.brightness;
  	bl_lvl = mfd->fbi->bl_curve[bl_lvl];
  	down(&mfd->sem);
  	msm_fb_set_backlight(mfd, bl_lvl);
  	up(&mfd->sem);
  	return 0;
  }
  
  static struct backlight_ops msm_fb_bl_ops = {
  	.get_brightness = msm_fb_bl_get_brightness,
  	.update_status = msm_fb_bl_update_status,
  };
  
  void msm_fb_config_backlight(struct msm_fb_data_type *mfd)
  {
  	struct msm_fb_panel_data *pdata;
  	struct backlight_device *pbd;
  	struct fb_info *fbi;
  	char name[16];
  	struct backlight_properties props;
  
  	fbi = mfd->fbi;
  	pdata = (struct msm_fb_panel_data *)mfd->pdev->dev.platform_data;
  
  	if ((pdata) && (pdata->set_backlight)) {
  		snprintf(name, sizeof(name), "msmfb_bl%d", mfd->index);
  		props.max_brightness = FB_BACKLIGHT_LEVELS - 1;
  		props.brightness = FB_BACKLIGHT_LEVELS - 1;
  		pbd =
  		    backlight_device_register(name, fbi->dev, mfd,
  					      &msm_fb_bl_ops, &props);
  		if (!IS_ERR(pbd)) {
  			fbi->bl_dev = pbd;
  			fb_bl_default_curve(fbi,
  					    0,
  					    mfd->panel_info.bl_min,
  					    mfd->panel_info.bl_max);
  		} else {
  			fbi->bl_dev = NULL;
  			printk(KERN_ERR "msm_fb: backlight_device_register failed!\n");
  		}
  	}
  }
  